(* Example of Unix spline(1) to smooth a curve. This is a file to draw sin(i) for i going from -pi to pi *) newgraph yaxis min -1 max 1 label : sin(i) xaxis label : i grid_lines border title : Example Unix spline(1) to interpolate points (* Plot the sin curve *) newline label : data pts include bailey.pts copycurve label : splined linetype dotted pts shell : spline < bailey.pts (* bailey.pts file: -3.1416 0.0 -1.81 -0.9715 -0.55 -0.5226 0.71 0.6518 1.97 0.9213 3.1416 0.0 *)